diff --git a/chrome/centered_tab_label.css b/chrome/centered_tab_label.css
index 0b9382e..4197d89 100644
--- a/chrome/centered_tab_label.css
+++ b/chrome/centered_tab_label.css
@@ -3,13 +3,10 @@ See the above repository for updates as well as full license text. */
 
 .tab-label-container{
   display: grid;
-  justify-content: safe center; /* Fx <112 compatibility */
-  align-items: safe center; /* Fx <112 compatibility */
   align-content: center;
 }
 
 .tab-secondary-label{
-  -moz-box-pack: center; /* Fx <112 compatibility */
   justify-content: center;
 }
 
diff --git a/chrome/classic_firefox_menu_button.css b/chrome/classic_firefox_menu_button.css
index 7adb917..ae66dcb 100644
--- a/chrome/classic_firefox_menu_button.css
+++ b/chrome/classic_firefox_menu_button.css
@@ -14,7 +14,6 @@ See the above repository for updates as well as full license text. */
 }
 
 #PanelUI-button{
-  -moz-box-ordinal-group: 0; /* Fx <112 compatibility */
   order: -1;
   margin-inline: 2px var(--uc-window-drag-space-pre,24px) !important;
 }
@@ -23,7 +22,6 @@ See the above repository for updates as well as full license text. */
   padding-left: 0px !important;
 }
 #PanelUI-menu-button{
-  -moz-box-align: start !important; /* Fx <112 compatibility */
   align-items: start;
 }
 #PanelUI-menu-button > stack{
diff --git a/chrome/classic_grid_main_menu_popup.css b/chrome/classic_grid_main_menu_popup.css
index 6e3b947..24fc8f6 100644
--- a/chrome/classic_grid_main_menu_popup.css
+++ b/chrome/classic_grid_main_menu_popup.css
@@ -34,7 +34,6 @@ See the above repository for updates as well as full license text. */
 }
 #appMenu-protonMainView > .panel-subview-body > toolbarbutton{
   flex-direction: column;
-  -moz-box-orient: vertical; /* Fx <112 compatibility */
 }
 
 :where(#appMenu-protonMainView) > .panel-subview-body > toolbarbutton.subviewbutton{
@@ -61,8 +60,6 @@ See the above repository for updates as well as full license text. */
 #appMenu-zoom-controls + toolbarseparator{ margin-block: 0 4px !important; }
 #appMenu-zoom-controls{ padding-block: 2px !important; }
 #appMenu-zoom-controls > :not(:last-child){
-  -moz-box-flex: 1 !important; /* Fx <112 compatibility */
-  -moz-box-pack: center !important; /* Fx <112 compatibility */
   flex-grow: 1 !important;
   justify-content: center !important;
   border-radius: 0 !important;
@@ -179,8 +176,6 @@ See the above repository for updates as well as full license text. */
 #appMenu-quit-button2{
   background-color: var(--button-bgcolor) !important;
   border-radius: 0 !important;
-  -moz-box-orient: horizontal !important; /* Fx <112 compatibility */
-  -moz-box-pack: center !important; /* Fx <112 compatibility */
   flex-direction: row !important;
   justify-content: center !important;
   padding-block: 12px !important;
diff --git a/chrome/fake_statusbar_w_bookmarksbar.css b/chrome/fake_statusbar_w_bookmarksbar.css
index 1d9232c..e8889cd 100644
--- a/chrome/fake_statusbar_w_bookmarksbar.css
+++ b/chrome/fake_statusbar_w_bookmarksbar.css
@@ -45,7 +45,6 @@ See the above repository for updates as well as full license text. */
 
 #personal-toolbar-empty{ visibility: hidden; }
 #PersonalToolbar .toolbarbutton-1{
-  -moz-box-align: center !important; /* Fx <112 compatibility */
   align-items: center !important;
 }
 
diff --git a/chrome/floating_findbar_on_top.css b/chrome/floating_findbar_on_top.css
index 9dd21f4..2bd0412 100644
--- a/chrome/floating_findbar_on_top.css
+++ b/chrome/floating_findbar_on_top.css
@@ -9,7 +9,6 @@ See the above repository for updates as well as full license text. */
  */
 
 findbar{
-  -moz-box-ordinal-group: 0; /* Fx <112 compatibility */
   order: -1;
   margin-bottom: -33px;
   position: relative;
@@ -50,7 +49,6 @@ findbar > .findbar-container{
   display: flex;
   overflow: hidden;
   text-overflow: ellipsis;
-  -moz-box-flex: 1; /* Fx <112 compatibility */
   flex-grow: 1;
 }
  
@@ -59,7 +57,6 @@ findbar > .findbar-container{
   border-radius: 0 !important;
   padding: 5px !important;
   width: initial !important;
-  -moz-box-ordinal-group: 0; /* Fx <112 compatibility */
   order: -1;
 }
 .findbar-closebutton > image{ padding: 3px }
@@ -72,13 +69,11 @@ findbar > .findbar-container > hbox{ margin: 0 5px }
 findbar::after{
   content:"";
   display: flex;
-  -moz-box-flex: 100; /* Fx <112 compatibility */
   flex-grow: 100;
 } 
 
 @supports -moz-bool-pref("userchrome.floating-findbar-on-right.enabled"){
   findbar{
-    -moz-box-direction: reverse; /* Fx <112 compatibility */
     flex-direction: row-reverse;
   }
   findbar > .findbar-container{
diff --git a/chrome/icon_only_tabs.css b/chrome/icon_only_tabs.css
index 52f72bf..2914230 100644
--- a/chrome/icon_only_tabs.css
+++ b/chrome/icon_only_tabs.css
@@ -9,7 +9,6 @@ See the above repository for updates as well as full license text. */
 }
 .tab-icon-stack > *{ margin-inline: 0 !important; }
 .tabbrowser-tab{
-  -moz-box-flex: 0 !important; /* Fx <112 compatibility */
   flex-grow: 0 !important;
 }
 
diff --git a/chrome/linux_gtk_window_control_patch.css b/chrome/linux_gtk_window_control_patch.css
index 99b4405..b9f84d0 100644
--- a/chrome/linux_gtk_window_control_patch.css
+++ b/chrome/linux_gtk_window_control_patch.css
@@ -5,7 +5,6 @@ See the above repository for updates as well as full license text. */
 /* More importantly, this makes window controls to respect layout rules the other styles rely on */
 
 .titlebar-buttonbox{
-  -moz-box-align: stretch !important; /* Fx <112 compatibility */
   align-items: stretch !important;
 }
 .titlebar-button {
diff --git a/chrome/menubar_in_main_toolbar.css b/chrome/menubar_in_main_toolbar.css
index 709e3a5..a5cd887 100644
--- a/chrome/menubar_in_main_toolbar.css
+++ b/chrome/menubar_in_main_toolbar.css
@@ -7,7 +7,6 @@ See the above repository for updates as well as full license text. */
 :root[uidensity="compact"] #navigator-toolbox{ --uc-menubar-height: 30px }
 
 #titlebar{
-  -moz-box-direction: reverse; /* Fx <112 compatibility */
   flex-direction: column-reverse;
   -moz-appearance: none !important;
 }
@@ -21,7 +20,6 @@ See the above repository for updates as well as full license text. */
 }
 
 #menubar-items{
-  -moz-box-pack: center; /* Fx <112 compatibility */
   justify-content: center;
   pointer-events: initial;
   margin-top: 3px;
diff --git a/chrome/multi-row_tabs.css b/chrome/multi-row_tabs.css
index b218854..e17ebb6 100644
--- a/chrome/multi-row_tabs.css
+++ b/chrome/multi-row_tabs.css
@@ -75,7 +75,6 @@ See the above repository for updates as well as full license text. */
 
 #tabbrowser-tabs[hasadjacentnewtabbutton][overflow] > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button {
   display: flex !important;
-  align-items: center; /* Fx <112 compatibility */
 }
 
 #alltabs-button,
diff --git a/chrome/multi-row_tabs_below_content.css b/chrome/multi-row_tabs_below_content.css
index 2e1394e..7a521ad 100644
--- a/chrome/multi-row_tabs_below_content.css
+++ b/chrome/multi-row_tabs_below_content.css
@@ -42,7 +42,6 @@ See the above repository for updates as well as full license text. */
   :root{ border-top-width: 0px !important }
 
   #navigator-toolbox{
-    -moz-box-ordinal-group: 2; /* Fx <112 compatibility */
     order: 2;
     border-bottom: none !important;
   }
@@ -50,7 +49,6 @@ See the above repository for updates as well as full license text. */
   #navigator-toolbox > div{ display: contents }
   .global-notificationbox,
   #tab-notification-deck{
-    -moz-box-ordinal-group: 0; /* Fx <112 compatibility */
     order: -1;
   }
 
diff --git a/chrome/multi-row_tabs_window_control_patch.css b/chrome/multi-row_tabs_window_control_patch.css
index a87810c..b6dd397 100644
--- a/chrome/multi-row_tabs_window_control_patch.css
+++ b/chrome/multi-row_tabs_window_control_patch.css
@@ -9,7 +9,6 @@ See the above repository for updates as well as full license text. */
 #TabsToolbar{ margin: 0 20px; }
 
 #titlebar{
-  -moz-box-direction: reverse; /* Fx <112 compatibility */
   flex-direction: column-reverse;
 }
 #toolbar-menubar{
@@ -21,7 +20,6 @@ See the above repository for updates as well as full license text. */
 :root[tabsintitlebar] #nav-bar{ padding-right: 138px; margin-left: 30px; }
 #toolbar-menubar > #menubar-items{
   position: relative;
-  -moz-box-pack: center; /* Fx <112 compatibility */
   justify-content: center !important;
   background-image: linear-gradient( to left,transparent,var(--toolbar-bgcolor) 35px);
   color: var(--toolbar-color);
diff --git a/chrome/normal_pinned_tabs.css b/chrome/normal_pinned_tabs.css
index 7a26f50..7452e95 100644
--- a/chrome/normal_pinned_tabs.css
+++ b/chrome/normal_pinned_tabs.css
@@ -7,7 +7,6 @@ See the above repository for updates as well as full license text. */
 
 .tabbrowser-tab{
   flex-grow: 100;
-  -moz-box-flex: 100; /* Fx <112 compatibility */
   max-width: 225px;
   min-width: var(--tab-min-width);
   width: 0;
@@ -17,7 +16,6 @@ See the above repository for updates as well as full license text. */
   display: flex !important
 }
 
-.tab-stack{ flex-grow: 1 } /* Fx <112 compatibility */
 .tabbrowser-tab[pinned] > .tab-stack{ border: none !important; }
 .tabbrowser-tab[pinned]::after{ position: static !important; margin-block: 0px 1px !important; }
 
diff --git a/chrome/overlay_menubar.css b/chrome/overlay_menubar.css
index 028bc28..7f4f928 100644
--- a/chrome/overlay_menubar.css
+++ b/chrome/overlay_menubar.css
@@ -24,7 +24,6 @@ See the above repository for updates as well as full license text. */
 }
 
 #menubar-items{
-  -moz-box-orient: horizontal !important; /* Fx <112 compatibility */
   flex-direction: row !important;
 }
 #menubar-items::after{
diff --git a/chrome/selected_tab_as_urlbar.css b/chrome/selected_tab_as_urlbar.css
index 8c374f2..f78f235 100644
--- a/chrome/selected_tab_as_urlbar.css
+++ b/chrome/selected_tab_as_urlbar.css
@@ -65,7 +65,6 @@ See the above repository for updates as well as full license text. */
   #TabsToolbar > .toolbar-items{ margin-left: 80px }
   :root[sizemode="normal"] #nav-bar-customization-target{ margin-left: 40px }
   #back-button, #forward-button{
-    -moz-box-ordinal-group: 0; /* Fx <112 compatibility */
     order: -1;
     visibility: visible !important;
     z-index: 2;
diff --git a/chrome/shrinking_pinned_tabs.css b/chrome/shrinking_pinned_tabs.css
index 0112abc..564873c 100644
--- a/chrome/shrinking_pinned_tabs.css
+++ b/chrome/shrinking_pinned_tabs.css
@@ -15,7 +15,6 @@ See the above repository for updates as well as full license text. */
 
 #tabbrowser-arrowscrollbox:not([overflowing]) .tab-content[pinned] {
   padding: 0px !important;
-  -moz-box-pack: center; /* Fx <112 compatibility */
   justify-content: center;
 }
 
diff --git a/chrome/tabs_on_bottom.css b/chrome/tabs_on_bottom.css
index 6476f8a..c779c4a 100644
--- a/chrome/tabs_on_bottom.css
+++ b/chrome/tabs_on_bottom.css
@@ -34,7 +34,6 @@ have menubar permanently enabled and want it on top
 .titlebar-buttonbox-container > .titlebar-buttonbox{ height: 100%; }
 
 #titlebar{
-  -moz-box-ordinal-group: 2; /* Fx <112 compatibility */
   order: 2;
   -moz-appearance: none !important;
   --tabs-navbar-shadow-size: 0px;
@@ -44,7 +43,6 @@ have menubar permanently enabled and want it on top
 #navigator-toolbox > div{ display: contents }
 .global-notificationbox,
 #tab-notification-deck{
-  -moz-box-ordinal-group: 2; /* Fx <112 compatibility */
   order: 2;
 }
 
@@ -54,7 +52,6 @@ have menubar permanently enabled and want it on top
 
 @media (-moz-gtk-csd-close-button){
   .titlebar-button{
-    -moz-box-orient: vertical; /* Fx <112 compatibility */
     flex-direction: column;
   }
 }
@@ -76,7 +73,6 @@ toolbox#navigator-toolbox > toolbar#nav-bar.browser-toolbar{ animation: none; }
 /* Uncomment the following if you want bookmarks toolbar to be below tabs */
 /*
 #PersonalToolbar{
-  -moz-box-ordinal-group: 2;
   order: 2;
 }
 */
diff --git a/chrome/toolbarbuttons_icon+label.css b/chrome/toolbarbuttons_icon+label.css
index 0505832..72d8e09 100644
--- a/chrome/toolbarbuttons_icon+label.css
+++ b/chrome/toolbarbuttons_icon+label.css
@@ -4,9 +4,7 @@ See the above repository for updates as well as full license text. */
 /* Shows both icon and label for toolbarbuttons */
 
 toolbar .toolbarbutton-1[label]{
-  -moz-box-orient: vertical; /* Fx <112 compatibility */
   flex-direction: column;
-  -moz-box-align: center !important; /* Fx <112 compatibility */
   align-items: center !important;
 }
 
diff --git a/chrome/toolbars_below_content.css b/chrome/toolbars_below_content.css
index e1d5b0b..27c2eff 100644
--- a/chrome/toolbars_below_content.css
+++ b/chrome/toolbars_below_content.css
@@ -15,13 +15,11 @@ See the above repository for updates as well as full license text. */
   #browser,
   #customization-container,
   #tab-notification-deck{
-    -moz-box-ordinal-group: 0; /* Fx <112 compatibility */
     order: -1;
   }
 
   /* Remove the next row if you want tabs to be the top-most row */
   #titlebar{
-    -moz-box-ordinal-group: 2; /* Fx <112 compatibility */
     order: 2;
   } 
 
diff --git a/chrome/urlbar_popup_full_width.css b/chrome/urlbar_popup_full_width.css
index 84fb1b9..26140c9 100644
--- a/chrome/urlbar_popup_full_width.css
+++ b/chrome/urlbar_popup_full_width.css
@@ -31,13 +31,6 @@ See the above repository for updates as well as full license text. */
   --uc-urlbar-min-width: none; /* navbar_tabs_oneliner.css compatibility */
 }
 
-#urlbar,
-#urlbar-background,
-#urlbar-input-container,
-.urlbarView{
-  flex-grow: 1; /* Fx <112 compatibility */
-}
-
 #urlbar[focused]{ box-shadow: inset 0 0 0 1px var(--toolbar-field-focus-border-color, highlight); }
 
 .urlbarView{
diff --git a/chrome/vertical_popup_menubar.css b/chrome/vertical_popup_menubar.css
index 4e2e0ea..c7380fd 100644
--- a/chrome/vertical_popup_menubar.css
+++ b/chrome/vertical_popup_menubar.css
@@ -24,7 +24,6 @@ menubar:hover > menu,
   inset-inline-start: 0;
 }
 :root:not([customizing]) menubar{
-  -moz-box-orient: vertical; /* Fx <112 compatibility */
   flex-direction: column;
 }
 menubar > menu { padding: 3px }
diff --git a/chrome/window_control_placeholder_support.css b/chrome/window_control_placeholder_support.css
index ca065f5..310d989 100644
--- a/chrome/window_control_placeholder_support.css
+++ b/chrome/window_control_placeholder_support.css
@@ -80,11 +80,9 @@ See the above repository for updates as well as full license text. */
   :root[sizemode="fullscreen"] #TabsToolbar > .titlebar-buttonbox-container:last-child,
   :root[sizemode="fullscreen"] #window-controls{ right: unset; }
   .titlebar-buttonbox-container{
-    -moz-box-ordinal-group: 0 !important; /* Fx <112 compatibility */
     order: -1 !important;
   }
   .titlebar-buttonbox{
-    -moz-box-direction: reverse; /* Fx <112 compatibility */
     flex-direction: row-reverse;
   }
 }